Pump.



F. HOFFSTAEDT.

PUMP.

APPucgTlou FILED NOV. 28,:1914.

Patented Mar. 28, 1916.

2 SHEETS-SHEET l- Ecfflbffstaedi attmua THE COLUMBlA PLANOGRAPH 60., WASHINGTON, n. c

F. J. HOFFSTAEDT.

-PUMP. APPLICATION FILED NOV. 28. 1914. 1,177,521. Patented Mar. 28,1916.

2 snzm-suzn 2. 29 v f 5 6 UNITED STATES PATENT OFFICE.

FREDERICK .r. HOFFSTAEDT, or PHOENIX, ARIZ'QNA.

PUMP.

- Specification of Letters Patent. Patented Mar. 28, 1916.

Application filed. November 28, 1914. Serial Nb. 874,509.

siding at Phoenix, in the county of Maricopaand State of Arizona, have invented new and useful Improvements in Pumps, of which the following is a specification.

V This invention relates to. pumps and especially to pumps for deep wells.

One object of the invention is to produce a simple and eflective double acting pump which is equipped with two plungers adaptied to move in opposite directions so that when the pump is in operation one or the other of said plungers will always be-lifting fluid or making an effective stroke, thereby producing a constant flow of fluid,

A f'urtlier object of the invention is to simplify and improve the'construction of the pump and its operating mechanism.

A further. object of the invention is to improve .and simplify the manner of sup porting the pump casing and the pump barrel, enabling the same to be supported in a dug well without the use of timbers oroth er means for supporting the casing, and also enabling the pump barrel to be easily and quickly adjusted to correct' any deflection thereof.

A further ,object of the invention is to produce a construction which will enable the plungers to be conveniently withdrawn from the pump whenever needed for repairs or repacking.

With these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawings has been illustrated a simple and preferred form of the invention, it being, however, understood a vertical sectional view of the pump barrel, showmg. also a portion of the conducting pipe. F g. 6 is a sectional detail view taken on the line 6-6 in Fig. 3. Fig. 7 is a sectional detail view taken on the line 7-7 in Fig. 5. Fig. 8 is a detail view showing a sprocket wheel of modified construction.

Corresponding parts in the several figures are denoted by like characters of reference. A base 15 of ample superficial area is ar ranged directly above the well inwhich the 1mproved pump is to be used for the purpose of supporting the pump casing, the

barrel and the mechanism for operating the pump.

The pump barrel or cylinder 16 is sup ported the lower end. ofthe casing 21 with whlch it maybe connected by a threaded collar 17 or in any well known manner. The casing 21 which, in a deep,

well, may be composed of any desired number of pipes or sections suitably coupled to gether, extends upwardly from the pump cylinder, said casing being provided near 1ts upperend with a divergent spout 22. The upper extremity'of the casing 21is provided with an annularly flanged collar 23 with which is detachably connected a lid 24 having a gland 25; the flanged collar is engaged by supporting rods 26 that extend downwardly from the base 15, said supportlng. rods being connected with the flanged collar-in such a fashion as not to interfere with the removal of the lid 24, thelatter being provided, as best seen in Fig. 7, with notches 18 accommodating the rods 26. The

upper ends of the rods 26 which extend through the base 15'are threaded and provided with nuts 19 which may be readily adjusted to enable any deflections from the vertical of the pump cylinder to be corrected,

The-base 15 supports a' frame including side members 27, uprights 28 intermediate the side members and 1n alinementth'erewith, a cap beam-29 which is connected with is a shaft 34, the shafts 31, 34 being pro;

vided with intermeshing pinions 35, 36, whereby the shaft 34 will be driven in the opposite direction to the shaft 31. Counter 1 by avoiding strain due to friction.

shafts 37 are supported for rotation in bearings 38 near the upper ends of the uprights 28, where said bearings are adjustably mounted by means of bolts 39 engaging slots 40 in the respective bearing members, the

latter being mounted on opposite sides of the uprights 28. The bearing members 38 are also provided adjacent to their upper ends with flanges 41 which are connected by adjusting bolts 42 with flanges43 on the cap beam 29. The counter shafts 37 are provided with sprockets 44 that are connected by chains 45 with sprockets 46'on the shafts 31 and 34. It will be seen that owing to the manner of mounting the boxes or bearing members 38, as previously described, slack in the chains 25 may be readily taken up at any time, and chains of different lengths maybe used, said chains being kept absolutely taut at all times during the operation of the machine. cludes a link 47 which is connected by a rod 48 with a slide which is mounted for vertical reciprocation in a guide 50, which latter is securely connected with a bracket 51 on one of the uprights 28 in such a manner as to depend downwardly from the base. The links 47 of the respective chains are so. arranged that one of said links will always move upwardly, while the other link is moving in a downward direction, thus causing the slides 49 to likewise move in 0pposite directions. One slide 49 carries a downwardly extending tubular valve rod 52 which is guided through the gland 25 and which is connected at its upper end with a plunger 53 having a valve 54. The other slide 49 is connected with the upper end of a plunger rod 55 which is guided through the tubular plunger rod 52 and which carries at its lower end a plunger 56 having a valve 57, said plungers 53 and 56 being arranged for reciprocation in the pump barrel or cylinder.

It will be seen from the foregoing description that when the improved apparatus is in motion, the slides 49 will be reciprocated vertically by the rods which are connected with the links 47 of the endless chains 45, the length of the stroke being governed by the length of the chains, and the lifting strokes, which are accomplished by the upward movement of the inner leads of the chains, being accomplished practically by a straight upward vertical movement, there- The plungers, the valves of which open upwardly, will thus be reciprocated oppositely, one of said plungers moving downwardly, while the other is moving in an upward direction. The downwardly moving plunger permits the water or other fluid to pass upwardly therethrough, while the upwardly Each of the chains 45 in-,

moving plunger will lift, the column of fluid and cause it to be discharged through the spout 22, the flow of fluid being constant as long as the machine is in operation. The

construction of the improved pumping apparatus is simple and inexpensive and :off

such a nature that the working parts are readily accessible for repairs whenever needed.

Instead of the sprocket ;wheels 37 and 46,

best shown inFigs. land 3 of the drawings,

as well as on the upward movement of the 1 valve rods, therebyavoiding undue friction on the downward as well as the upwardmovement.

Having thus described the invention, what 1 is claimed as new, is

l. A cylinder having a circumferential flange at one end, a cover resting against the flange and provided with peripheral notches, a concentric gland'carried by the cover, for the passage of a plunger and fas-.

tening means passing through openings in the flange and removably engaging the notches.

2. In a device of the class. described, a

base, a pump cylinder having a casing suspended from the base, a frame mounted on the base and including vertical uprights,

shafts supported on opposite sides of said uprights and having intermeshing gears,

means for driving one of said shafts, counter shafts supported adjustably abovethefirst mentioned shafts, sprockets on the counter shafts and on the first mentioned shafts,

chains guided over the sprockets, each of said chains having a link with which the upper end of a connecting rod is connected, a bracket extending from one ofthe uprights, a guidemember connected with said bracket and depending therefrom downwardly with respectto the base, slides mounted in said guide and connected with" the connecting rods associated :with the respective chains, plungers arranged for. reciprocation. in the pump cylinder, a tube extending upwardly from one plunger and connected with one slide, and 'an'operating rod connected with the other plunger, guided through the tube and connected with the second slide.

In testimony whereof I affix my signature in presence of two witnesses.- V

FREDERICK J. HOFFSTAEDT. Witnesses:

PAUL H. ANDERSON, HoRA'rIo J. CORGY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latenta; Washington, D. G. 

